From: Alex Deucher <alexander.deucher@amd.com>
Date: Mon, 25 Mar 2013 22:28:29 +0000 (-0400)
Subject: drm/radeon/dpm: add pcie gen helper function
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4bd9f516f622b883b35cda8fb38b95f3a493fc17;p=linux-beck.git

drm/radeon/dpm: add pcie gen helper function

Add a helper function to determine the preferred
pcie gen based on the card, system, and circumstance.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/radeon/r600_dpm.c b/drivers/gpu/drm/radeon/r600_dpm.c
index 2e5ec65a78f7..28177da694f2 100644
--- a/drivers/gpu/drm/radeon/r600_dpm.c
+++ b/drivers/gpu/drm/radeon/r600_dpm.c
@@ -997,3 +997,26 @@ void r600_free_extended_power_table(struct radeon_device *rdev)
 	if (rdev->pm.dpm.dyn_state.ppm_table)
 		kfree(rdev->pm.dpm.dyn_state.ppm_table);
 }
+
+enum radeon_pcie_gen r600_get_pcie_gen_support(struct radeon_device *rdev,
+					       u32 sys_mask,
+					       enum radeon_pcie_gen asic_gen,
+					       enum radeon_pcie_gen default_gen)
+{
+	switch (asic_gen) {
+	case RADEON_PCIE_GEN1:
+		return RADEON_PCIE_GEN1;
+	case RADEON_PCIE_GEN2:
+		return RADEON_PCIE_GEN2;
+	case RADEON_PCIE_GEN3:
+		return RADEON_PCIE_GEN3;
+	default:
+		if ((sys_mask & DRM_PCIE_SPEED_80) && (default_gen == RADEON_PCIE_GEN3))
+			return RADEON_PCIE_GEN3;
+		else if ((sys_mask & DRM_PCIE_SPEED_50) && (default_gen == RADEON_PCIE_GEN2))
+			return RADEON_PCIE_GEN2;
+		else
+			return RADEON_PCIE_GEN1;
+	}
+	return RADEON_PCIE_GEN1;
+}
diff --git a/drivers/gpu/drm/radeon/r600_dpm.h b/drivers/gpu/drm/radeon/r600_dpm.h
index c6b9e30f20c2..a95ab214289b 100644
--- a/drivers/gpu/drm/radeon/r600_dpm.h
+++ b/drivers/gpu/drm/radeon/r600_dpm.h
@@ -218,4 +218,9 @@ bool r600_is_internal_thermal_sensor(enum radeon_int_thermal_type sensor);
 int r600_parse_extended_power_table(struct radeon_device *rdev);
 void r600_free_extended_power_table(struct radeon_device *rdev);
 
+enum radeon_pcie_gen r600_get_pcie_gen_support(struct radeon_device *rdev,
+					       u32 sys_mask,
+					       enum radeon_pcie_gen asic_gen,
+					       enum radeon_pcie_gen default_gen);
+
 #endif